全文获取类型
收费全文 | 395336篇 |
免费 | 42135篇 |
国内免费 | 2817篇 |
专业分类
耳鼻咽喉 | 8378篇 |
儿科学 | 12957篇 |
妇产科学 | 7388篇 |
基础医学 | 38441篇 |
口腔科学 | 7041篇 |
临床医学 | 45962篇 |
内科学 | 100531篇 |
皮肤病学 | 14131篇 |
神经病学 | 36342篇 |
特种医学 | 13866篇 |
外国民族医学 | 103篇 |
外科学 | 71530篇 |
综合类 | 1407篇 |
现状与发展 | 72篇 |
一般理论 | 63篇 |
预防医学 | 29098篇 |
眼科学 | 8108篇 |
药学 | 18154篇 |
中国医学 | 728篇 |
肿瘤学 | 25988篇 |
出版年
2023年 | 5927篇 |
2022年 | 2056篇 |
2021年 | 6571篇 |
2020年 | 7944篇 |
2019年 | 6094篇 |
2018年 | 14765篇 |
2017年 | 12103篇 |
2016年 | 13231篇 |
2015年 | 13767篇 |
2014年 | 21154篇 |
2013年 | 24897篇 |
2012年 | 21894篇 |
2011年 | 21931篇 |
2010年 | 18441篇 |
2009年 | 20272篇 |
2008年 | 19865篇 |
2007年 | 19176篇 |
2006年 | 20467篇 |
2005年 | 17635篇 |
2004年 | 16064篇 |
2003年 | 13946篇 |
2002年 | 13422篇 |
2001年 | 10435篇 |
2000年 | 9695篇 |
1999年 | 9214篇 |
1998年 | 4681篇 |
1997年 | 4309篇 |
1996年 | 4139篇 |
1995年 | 3933篇 |
1994年 | 2595篇 |
1993年 | 2134篇 |
1992年 | 4794篇 |
1991年 | 4532篇 |
1990年 | 4009篇 |
1989年 | 3888篇 |
1988年 | 3564篇 |
1987年 | 3241篇 |
1986年 | 3158篇 |
1985年 | 2797篇 |
1984年 | 2072篇 |
1983年 | 1839篇 |
1982年 | 1261篇 |
1979年 | 1644篇 |
1978年 | 1270篇 |
1977年 | 1279篇 |
1974年 | 1322篇 |
1973年 | 1321篇 |
1972年 | 1346篇 |
1971年 | 1221篇 |
1970年 | 1190篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Jean-Sébastien Fallu Jürgen Rehm Emmanuel N. Kuntsche Esther Grichting Neerav Monga Edward M. Adlaf Susan J Bondy Gerhard Gmel 《Sozial- und Pr?ventivmedizin》2006,8(1):363-372
Volume and profile of alcohol consumption among students and classmates as predictors of aggression and victimization: a multilevel
analysis among Swiss adolescents
Objective:
To test the effects of the volume of alcohol consumption and drinking patterns on alcohol-related aggression and victimization, both at the individual and class levels. 相似文献22.
L González-Bayón S González-Moreno G Ortega-Pérez 《European journal of surgical oncology》2006,32(6):619-624
The new treatment strategy for Peritoneal Surface Malignancy combines a cytoreductive surgery and perioperative intraperitoneal chemotherapy. Cytoreduction removes all macroscopic tumor. Intraperitoneal chemotherapy avoids implantation of microscopic residual tumor cells on intra-abdominal surfaces when it is administered intraoperatively and/or early in the postoperative period. Delivering cytotoxic drugs directly into the peritoneal cavity maximizes dose intensity and minimizes systemic toxicity. Hyperthermia is selectively cytotoxic for malignant cells and potentiates the effect of chemotherapy. Implementation of this procedure makes the perioperative personnel to face a risk of exposure to cytotoxic agents. Furthermore, peritonectomies and electro-evaporation of tumor nodules are performed with high voltage electrocautery, generating a large amount of surgical smoke during several hours. Inhalation of these fumes may be also a risk for healthcare workers. In this article, we analyse in depth these new risks of the operating room personnel, we review the literature, and we give guidelines for secure performance of cytoreductive surgery and hyperthermic intraoperative intraperitoneal chemotherapy, as well as for early postoperative intraperitoneal chemotherapy administration. These new procedures are safe techniques for patients and healthcare workers provided adequate policies are adopted to avoid occupational exposure. 相似文献
23.
24.
25.
Timothy C. Evans MD PhD ; Keren H. Wick PhD ; Douglas M. Brock PhD ; Douglas C. Schaad PhD ; Ruth Ballweg MPA PA-C 《The Journal of rural health》2006,22(3):212-219
CONTEXT: The physician assistant profession has been moving toward requiring master's degrees for new practitioners, but some argue this could change the face of the discipline. PURPOSE: To see if there is an association between physician assistants' academic degrees and practice in primary care, in rural areas, and with the medically underserved. METHODS: Surveys were sent to 880 graduates of the first 32 University of Washington physician assistant classes through 2000. Respondents noted their academic degree at program entry and the highest degree attained at any time up to the time of survey. Relationships between practice characteristics and academic degree levels were tested by unadjusted odds ratios and logistic regression after controlling for year of graduation and sex. RESULTS: Of the 478 respondents, 54% worked in primary care, about 30% practiced in nonmetropolitan communities, and 42% reported providing care for the medically underserved. Respondents with no degree (33% of total at entry, 24% at survey) were significantly more likely than degree holders to work in primary care and nonmetropolitan areas. Respondents with no degree at program entry were significantly more likely, and those with no degree at the time of the survey were marginally more likely, to self-report work with the medically underserved. CONCLUSION: Respondents with no academic degree are significantly more likely to demonstrate a commitment to primary, rural, and underserved health care. These findings may inform the national debate about the impact of required advanced degrees on the practice patterns of nonphysician providers. 相似文献
26.
Social phobia, fear of negative evaluation and harm avoidance. 总被引:1,自引:0,他引:1
M Faytout J Tignol J Swendsen D Grabot B Aouizerate J P Lépine 《European psychiatry》2007,22(2):75-79
This naturalistic, prospective investigation examined the role of fear of negative evaluation and the personality trait of harm avoidance in the anxiety levels of treated social phobia patients. One hundred and fifty-seven patients with DSM-IV social phobia were assessed before starting treatment and were then followed for up to two years. As expected, greater fear of negative evaluation and higher scores of harm avoidance were associated with greater anxiety at the 6 month follow-up, and harm avoidance remained a significant predictor at 24 months. However, no evidence was found for an interaction between the personality and cognitive variables examined. The findings are discussed in terms of the relative independence of these factors, as well as their potential implications for the treatment of this disorder. 相似文献
27.
28.
29.
30.
Hugo Maia Julio Casoy Tania Correia Luís Freitas Kleber Pimentel Célia Athayde Elsimar Coutinho 《Gynecological endocrinology》2006,22(10):547-551
OBJECTIVES: To determine whether aromatase expression in the eutopic endometrium and adenomyotic foci is affected by previous use of oral contraceptives containing gestodene, and to determine whether changes in cyclooxygenase-2 (COX-2) expression occur in adenomyosis during the menstrual cycle. PATIENT AND METHODS: This was a retrospective cohort study carried out in paraffin-embedded endometrial tissue obtained from patients with a histological diagnosis of adenomyosis obtained during the proliferative (n = 25) and luteal (n = 10) phases of the menstrual cycle and following the use of continuous oral contraception with gestodene/ethinyl estradiol (n = 7). COX-2 and aromatase expression were measured in both eutopic endometrium and adenomyotic foci using immunohistochemical methods. RESULTS: Aromatase expression was detected in 80% of the endometrial slices by immunohistochemistry. In positive cases, aromatase was mainly detected in the stromal cells of the eutopic endometrium, whereas in the adenomyotic foci this expression was negative in the majority of the cases. Oral contraceptives containing gestodene, on the other hand, were effective in suppressing aromatase expression in both eutopic and ectopic endometrium. COX-2 expression was detected by immunohistochemistry in the glandular epithelium of both eutopic endometrium and adenomyotic foci and there were no significant changes in its intensity throughout the menstrual cycle. CONCLUSION: Aromatase expression in the eutopic endometrium and adenomyotic foci is suppressed by oral contraceptives containing gestodene. Increased aromatase activity may be responsible for the persistent COX-2 expression during the luteal phase. 相似文献